It's an extension to the HLP format with an added emphasis on photo and video support, and it had its own viewer titled Multimedia Viewer. Running it currently through helpdeco doesn't work, and binary file rippers like Jaeder Naub extract media such as text into small fragments. There is some limited documentation at this page, and an example of a program that utilizes MVB can be found here.
It's an extension to the HLP format with an added emphasis on photo and video support, and it had its own viewer titled Multimedia Viewer. Running it currently through helpdeco doesn't work, and binary file rippers like Jaeder Naub extract media such as text into small fragments. There is some limited documentation at this page, and an example of a program that utilizes MVB can be found here.